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Agate
Agate

Aragonite
Aragonite



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Agate
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Aragonite

Agate and Aragonite Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous, Resinous

Pleochroism

Absent
StrongArthur Thomas

Dispersion

0.010.17
0.005 1
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Transparency

Translucent
Transparent, Translucent

Refractive Index

1.530-1.5431.525-1.686
1 3.25
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Optic Character

-
-

Crystal System

Trigonal
Orthorhombic

Birefringence

0.0040.155
0 0.296
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Clarity

Translucent
Transparent

Agate and Aragonite Optic Character

Agate and Aragonite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Agate and Aragonite Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Agate and Aragonite optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

Agate and Aragonite Transparency

Similar to their colors, Agate and Aragonite transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Agate is Translucent while Agate is Translucent in appearance.